我们需要找个临时保姆来照看孩子，因为今晚要出去吃饭。

We need to find a ___sitter to look after the kids while we go out for dinner tonight.

这位模特充当静坐者，为画家保持姿势长达三小时。

The model acted as a ___sitter and held the pose for the painter for three hours.

这份工作对他来说简直是轻而易举，还有这么好的福利。

This job is a real ___sitter for him with such great benefits.